Apparatus

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sensors Mode-S transponder

ABBB5A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N855QS · CESSNA 700 Citation Longitude · operated by NETJETS SALES INC, SOKOLOWSKI BERND, HAGGERTY HOLLY, BLOOM BRADLEY, CENTURY AVIATION LLC, SCHENK CHRISTOPH

Hex
ABBB5A
Octal
52735532
Decimal
11,254,618
Country
US
Tail
N855QS
Type
C700
No current signal · last broadcast 2h ago
Flights observed
98
Distinct callsigns
2
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S ABBB5A.

Country allocation

The ICAO 24-bit address ABBB5A falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 2 distinct

Callsign Airline Flights Last seen
EJA855 NetJets 87 2026-05-30
N855QS - 11 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 EJA855 PVD → PBI May 30, 02:40 UTCMay 30, 03:20 UTC40m
2026-05-30 EJA855 PVD → PBI May 30, 01:20 UTCMay 30, 01:30 UTC10m
2026-05-29 EJA855 PVD → PBI May 29, 03:45 UTCMay 29, 07:20 UTC3h 35m
2026-05-28 EJA855 PVD → PBI May 28, 21:45 UTCMay 28, 22:05 UTC20m
2026-05-28 EJA855 PVD → PBI May 28, 15:35 UTCMay 28, 20:50 UTC5h 15m
2026-05-28 EJA855 PVD → PBI May 28, 14:25 UTCMay 28, 14:40 UTC15m
2026-05-27 EJA855 PVD → PBI May 27, 11:25 UTCMay 27, 11:35 UTC10m
2026-05-25 EJA855 PVD → PBI May 25, 20:19 UTCMay 25, 21:04 UTC45m
2026-05-25 EJA855 PVD → PBI May 25, 18:15 UTCMay 25, 18:40 UTC25m
2026-05-25 N855QS - May 25, 17:05 UTCMay 25, 17:30 UTC25m
2026-05-25 N855QS - May 25, 14:20 UTCMay 25, 14:40 UTC20m
2026-05-24 EJA855 PVD → PBI May 24, 23:00 UTCMay 24, 23:46 UTC46m
2026-05-24 EJA855 PVD → PBI May 24, 19:50 UTCMay 24, 21:00 UTC1h 10m
2026-05-24 EJA855 PVD → PBI May 24, 16:05 UTCMay 24, 18:55 UTC2h 50m
2026-05-23 EJA855 PVD → PBI May 23, 19:25 UTCMay 23, 20:50 UTC1h 25m
2026-05-23 EJA855 PVD → PBI May 23, 13:30 UTCMay 23, 18:30 UTC5h 1m
2026-05-22 EJA855 PVD → PBI May 22, 23:15 UTCMay 22, 23:40 UTC25m
2026-05-22 EJA855 PVD → PBI May 22, 18:40 UTCMay 22, 20:40 UTC2h 0m
2026-05-22 EJA855 PVD → PBI May 22, 15:40 UTCMay 22, 18:00 UTC2h 20m
2026-05-22 EJA855 PVD → PBI May 22, 13:20 UTCMay 22, 14:05 UTC45m
2026-05-21 EJA855 PVD → PBI May 21, 22:40 UTCMay 22, 01:55 UTC3h 15m
2026-05-21 EJA855 PVD → PBI May 21, 17:10 UTCMay 21, 20:10 UTC3h 0m
2026-05-21 EJA855 PVD → PBI May 21, 14:10 UTCMay 21, 16:05 UTC1h 55m
2026-05-21 EJA855 PVD → PBI May 21, 00:10 UTCMay 21, 01:30 UTC1h 20m
2026-05-20 EJA855 PVD → PBI May 20, 16:45 UTCMay 20, 22:55 UTC6h 10m
2026-05-20 EJA855 PVD → PBI May 20, 14:25 UTCMay 20, 15:20 UTC55m
2026-05-19 EJA855 PVD → PBI May 19, 21:15 UTCMay 19, 22:15 UTC1h 0m
2026-05-19 EJA855 PVD → PBI May 19, 18:40 UTCMay 19, 20:00 UTC1h 20m
2026-05-19 EJA855 PVD → PBI May 19, 13:10 UTCMay 19, 17:25 UTC4h 15m
2026-05-10 EJA855 PVD → PBI May 10, 23:55 UTCMay 11, 00:45 UTC50m
2026-05-08 EJA855 PVD → PBI May 8, 16:40 UTCMay 8, 20:55 UTC4h 15m
2026-05-07 EJA855 PVD → PBI May 7, 23:45 UTCMay 8, 00:40 UTC55m
2026-05-07 EJA855 PVD → PBI May 7, 18:30 UTCMay 7, 22:59 UTC4h 29m
2026-05-07 EJA855 PVD → PBI May 7, 15:05 UTCMay 7, 16:20 UTC1h 15m
2026-05-07 EJA855 PVD → PBI May 7, 12:45 UTCMay 7, 13:55 UTC1h 10m
2026-05-06 EJA855 PVD → PBI May 6, 22:50 UTCMay 6, 23:30 UTC40m
2026-05-06 EJA855 PVD → PBI May 6, 21:10 UTCMay 6, 22:15 UTC1h 5m
2026-05-06 EJA855 PVD → PBI May 6, 15:30 UTCMay 6, 18:05 UTC2h 34m
2026-05-05 EJA855 PVD → PBI May 5, 23:40 UTCMay 6, 03:45 UTC4h 5m
2026-05-05 EJA855 PVD → PBI May 5, 19:10 UTCMay 5, 20:35 UTC1h 25m
2026-05-05 EJA855 PVD → PBI May 5, 02:35 UTCMay 5, 07:10 UTC4h 35m
2026-05-04 N855QS - May 4, 18:30 UTCMay 4, 22:45 UTC4h 16m
2026-05-04 N855QS - May 4, 13:15 UTCMay 4, 15:30 UTC2h 15m
2026-05-03 EJA855 PVD → PBI May 3, 21:50 UTCMay 3, 22:30 UTC40m
2026-05-03 EJA855 PVD → PBI May 3, 20:05 UTCMay 3, 21:44 UTC1h 40m
2026-05-03 EJA855 PVD → PBI May 3, 15:55 UTCMay 3, 17:20 UTC1h 25m
2026-05-03 EJA855 PVD → PBI May 3, 14:25 UTCMay 3, 14:50 UTC25m
2026-05-03 EJA855 PVD → PBI May 3, 12:55 UTCMay 3, 13:15 UTC20m
2026-04-30 EJA855 PVD → PBI Apr 30, 14:40 UTCApr 30, 17:05 UTC2h 25m
2026-04-29 EJA855 PVD → PBI Apr 29, 23:05 UTCApr 29, 23:15 UTC10m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N855QS page for operator, model, and routing details .

Mode-S ABBB5A frequently asked

What is Mode-S code ABBB5A?
ABBB5A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N855QS.
Where is Mode-S ABBB5A registered?
Mode-S code ABBB5A is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is ABBB5A broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABBB5A, octal 52735532, decimal 11,254,618.
What flights does ABBB5A operate?
Mode-S ABBB5A has broadcast 2 distinct callsigns, including EJA855, N855QS.